32139389 has 4 divisors (see below), whose sum is σ = 32261856. Its totient is φ = 32016924.

The previous prime is 32139383. The next prime is 32139391. The reversal of 32139389 is 98393123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32139389 - 2²⁴ = 15362173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32139383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60839 + ... + 61364.

It is an arithmetic number, because the mean of its divisors is an integer number (8065464).

Almost surely, 2^32139389 is an apocalyptic number.

It is an amenable number.

32139389 is a deficient number, since it is larger than the sum of its proper divisors (122467).

32139389 is a wasteful number, since it uses less digits than its factorization.

32139389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122466.

The product of its digits is 34992, while the sum is 38.

The square root of 32139389 is about 5669.1612254371. The cubic root of 32139389 is about 317.9405140369.

The spelling of 32139389 in words is "thirty-two million, one hundred thirty-nine thousand, three hundred eighty-nine".